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铀是地球表面上最活泼的元素之一,在地下水中的含量可达0.1~10.0微克/升。铀有三种天然同位素:~(238)U、~(285)U和~(234)U。
Uranium is one of the most lively elements on Earth’s surface, with levels of up to 0.1 to 10.0 μg / L in groundwater. Uranium has three natural isotopes: ~ (238) U, ~ (285) U and ~ (234) U.